You are right that to a certain point it is an incomplete method. However, as you say, in real life this is something people should do for themselves. Now, what happens when we both do this in real life and we come to different conclusions as we seem to have done now? The only way to resolve it is to show some examples where you feel Nas reached some higher level of rhyming than Pac.
Also, the thing is that people don't usually claim that Pac was lyrical less consistently. They claim he just didn't have the same rhyming ability at all, meaning he wasn't able to rhyme in the way Nas did on Illmatic for example. Now this I'm saying can be shown to be wrong. And for that same reason it is a complete exaggeration to say that Nas is that much more lyrical than Pac. I have said this many times: for every line on Illmatic there is a Pac line, in terms of rhyming, that showcases the same rhyming ability. Now if Illmatic is one of the best lyrical albums of all times, then how can people call someone who can match any line on Illmatic weak lyrically?
If anything, it only shows Pac was less one-dimensional with the way he wrote his songs and used different rhyming styles suited to the purpose of his song. That is a strength, not a weakness.
there is no video footage of Pac and Nas meeting up that night of the MTV Awards, with a whole crew behind them 
Terrible analogy.Reggie miller was a one dimensional shooter while jordan was a complete player
@ naS having more "mystique" than Pac... nicca has ZERO mistique, unlike Pac once he started fanticizing about his own Death somewhere between S4MN and Thuglife Vol 1